Micrometer caliper height and surface gauge



June 19, 1923. 1,459Q5UI F. B.' CADY MICROMETER CALIPER HEIGHT AND SURFACE GAUGE Filed June 12, 1919 lllllllllllIIIIIIIIIIIIIIIINHIHHIIIIIHIII IIII Patented June 19, 1923.

-FR-ED B'. CADY, 0F UTICA, NEW YRK.V

MICROMETER CAIJ'IPER HEIGHT .AND SURFACE GAUGE.

Application led .Tune 12, 1919.

To all whom t may concern.:

Be it known that I, FRED B. CADY, a citizen of the United States, residing at Utica, in the county of Oneida, and State of New York, have invented certain. new and useful Improvements in Micrometer Caliper Height and Surface Gauges; and I do herebyl decla-re the following toy be a full, clear, and exact` description of the invention, such as will enable others skilled in the art to-which it appertains to make and. use the same.

f This invention. relatesj to improvements in calipers of that type combining a micrometer.

rEhe invention has for its object to provide automatically against the occurrence of lost motion inthe operation of the device.

A further object is to provide for automatically centralizing the positionespecially of the micrometer indicating hand in making its return movement.

A still further object is to show variations of sizes of work as registered on the indicator scale.

Other objects will be apparentand appreciated as` the nature and purposes of the invention may be disclosed inthe following description, and the accompanying illustrations.

' The invent-'ion consists thereforey of cer-l tain instr'umen-talities 'and features of construction substantially as hereinafter more fully disclosedand pointedout by the appended claims. Y

In the accompanying drawings. is illustra ed the preferred embodiment of my invention wherein it willv be understood that va-v rious changes and modifications as relate to the detailed construction and arrangement of parts may be 'made without departing from the spirit or scope .of the claims.

In the drawings n Figure l is a side elevation of my inven tion.

Figure 2 is a ragmental detailed sectional view, showing particularly theautomatically centralizing or return controlling springs ofthe micrometer, and the springs thereof for guarding against lost motion.

seria; No. 303,587.

Figure 3 is across section Fig. 2.

`Figure 4 is an enlarged detailed fragmental sectional view taken onV the line 4-4 of Figure l.

on line 3 3 of Figure 5. is an enlarged. detailed sectional right member or standard lA, connection.

therebetween being effected by mea-ns. of a bracket B, said standard. being suitably secured in a base a or otherwise, for its. retention.. The bracket B is slidablenpon the standard A and. has a preferably integral arm (l provided with a loop a adapted to receive, and to which is secured, the leg l", particularly as seen in Figure l. The bracket B is provided with end-laterally extended loops b in continuation thereof, which loops are provided with preferably knurled headed set or binding screws Z and e respectively. Said bracket vcarries a graduated member yor Vernier f pareille-ling, and for cooperation with a graduated. member g fixedly associated with the standard A., the set or binding screws d and e of the loops o cooperating with said graduated members f and g in effecting the requisite adjustment of the caliper-legs to the work, in accord ance with saidgraduationsor indicia which'.` mark 0H said members. j inches and fractions thereof, thus providing for taking the measurements of. they work.

The standard A' is providedat given. in-

tervals along its indicia or graduated edge,`

with sockets orjapertures 7L for facility of engagement therewith of. the set screws`r d and e, in effecting the Vertical movement or adjustment of` the caliper thereonwith. respect to the work.

and g vin required Aso ` or orifice 5 receiving a stub 5n yto the inwardly extending terminal of screw-held The leg lil of the caliper is in two sections, one section 1X being preferably angular or square in transverse section for a suitable portion of its length, commencing at the pivot ax, and thence laterally extended and tapered towards its opposite terminal which is stubbed, said extended and tapered portion being hollow or chambered, the chamber opening out through said terminal, one side of said chamber also being open with a removable closure 4DL and in practice having a preferably screwattached pin 4b for its convenient removal. The other section 1XX of the leg 1m, is separate from,`and independently movable of the section 1X andis shouldered as at Ba, to work against the stubbed terminal of the latter, said section 1XX being tapered in conformity with the taper of the section 1X and terminating in a preferably crescent-shaped bifurcation. The leg-section 1XX extends some distance, at its inner end, into the chamber of the leg-section 1X and has pivotal connection therewith. This connection is effected by'threadinglaterally through the walls of the chamber of the leg-section 1X, from the exterior, opposite tapered pivots 3', 3 with their tapering terminals received as set screws bearing against the inwardly extending portion of the leg-section 1XX thereby affording a sensitive bearing for said leg-section and facility in indicating variations'in the different sizes of work by the indicator.

The micrometer indicator or needle 1c, playing over a graduated segment 1Cc of lOOOth inch, has a somewhat enlarged terminal which is provided with an aperture integral with one side-wall ofthe chamber of the leg 1a. This end of the indicator or needle 1C has also a rounded elongation 6, and secured to the inwardly extending terminall pivotal member 8 of the leg-section 1X2 is a pair of preferably attenuated resilient members 7, forming springs and engaging opposite sides of the rounded elongation 6 of the indicator or needle 1c for providing against lost motion. A second pair of similar members or springs 8 are secured at the outer ends of the springs an elongated pivotal member 8a of the leg-section 1, adjacent the corresponding ends of the springs 7, their inner ends being setto the inner surface of the legsection 1X, these serving to automatically centralize the position of the needle or indicator upon making its return movement.

A finely threaded screw 9 for manipulating the device has its unthreaded portion passed freely through an elongated opening 10 in the leg-member 1a and threaded transversely'through an axis or pivot 11 positioned within an elongated opening 12 of the leg-member, l", with its ends pivoted in said applied thereover latter member to provide for the cooperative action thereof with the legember 1b and the screw 9, as in accommo-dating the differential action resulting from the two movements of these. The screw 9 is provided with a preferably head 13 which has a fixed tubular shank 14,

a portion thereof being circular in cross.

section as at 14 to receive the correspondingly co-ntoured unthreaded portion of the screw. The exterior of the outer end of said shank is angular in cross-section, Fig. 4 and adapted to enter a correspondingly contoured aperture of the head, the two being secured together preferably by means of an ordinary round-headed screw 15 inserted through said head and turned into screwthreaded engagement with the interior of said tubular shank.

Fitted quite tightly, but so as to be turned by hand, to the head 13, upon 'a' circular shoulder or extension 16 projecting centrally from the inner face of the head, is an annular member 17 havng indicia cumferential surface in required graduations of fractions of inches, as shown, cooperating with which is an indicator 18 lixedly carried by the caliper leg 1a, it being observed knurled or roughenedv upon its cirv that the annular graduated head 13 isalso with a quadrant 2O graduated in inches and y fractions thereof, and which graduated quadrant or scale is positioned and guided an having movement as at 21 upon the caliperleg 1b, one member of the guide upon said caliper-leg serving also as an indicator for cooperation with scale 20 as seen particularly in Figure 1.

Having thus described my invention, what I claim and desire to secure byLetters Patent is: v

1. Calipers of the type described, comprising pivoted together leg-members, one'legmember being in sections, one section 1Xx being partially housed and pivoted within the other' leg section, a micrometer-member or needle pivoted within one of the leg sections, and a member 8L forming an elongation of the pivoted end of the other leg-section, said elongated leg-section member being provided with pairs of resilent members, one pair of the latter being adapted to function with the micrometer-needle and the other pair of said resilient members adapted to function with said leg-member elongation .for the purpose set forth. y

2. Calipers of the type described, comprising pivoted-together leg members, one legmember being in sections and one section 1XX being partially housed and pivoted within the other leg-section, the pivotal connecby tapered pivots projecting from one legthe` micrometer-needle and the other pair.

of said resilient membersedaptedjto funetion with said leg-member elongation, as set forth. e

In 'testimony whereof, I aixmy signature.

FRE-D B. GADKY.y 

